Technically, we can't answer the question with the given information.
Even though the cart's speed is constant, it may be turning an corner,
or driving along a curved path. If it's not driving in a straight, then there
must be some force acting on it.
If the cart IS driving in a straight line, AND its speed is constant, then
there can't be any net force acting on it. In that case, the correct choice
is ' B '. (I'm sure this is right IF the cart is driving in a straight line.)
The astrometric technique of planet detection works best for massive planets around nearby stars.
Answer: 8*10^-15 N
Explanation: In order to calculate the force applied on an electron in the middle of the two planes at 500 V we know that, F=q*E
The electric field between the plates is given by:
E = ΔV/d = 500 V/0.01 m=5*10^3 N/C
the force applied to the electron is: F=e*E=8*10^-15 N
Answer:
Explanation:
The electric field that will balance the weight of the oil drop can be calculated using the following:
electric force, F = e E ( where, e is the charge of an electron and E is the electric field)
weight, W = 2.5 ×10⁻¹⁴ N
e E = W

Substitute the values:

Answer:
528398.4375 N/C opposite to the direction of the proton

288.24609375 N/C in the same direction of the motion of the electron
Explanation:
t = Time taken
u = Initial velocity = 0
v = Final velocity = 
s = Displacement = 3.2 cm
a = Acceleration
Mass of electron = 
Mass of electron = 
q = Charge of particle = 

Electric field is given by

The electric field is 528398.4375 N/C opposite to the direction of the proton

The time taken is 

The electric field is 288.24609375 N/C in the same direction of the motion of the electron